JPS6291446A - Fireproofing glass wall - Google Patents

Abstract

A fire resistant glazing comprising at least two parallel glass sheets, frame means for separating each of said sheets one from another by a predetermined distance and defining an intermediate space therebetween which is sealed at the periphery of the glass sheets and a hydrogel substantially filling said intermediate space, said hydrogel comprising about 70-90% by weight of water, about 10-30% by weight of a water soluble salt and, as an additive, from about 0.2 to about 2.0% by weight, in relation to the amount of water soluble salt, of a water soluble anticorrosive compound. The anticorrosive compound may be an alkali phosphate, an alkali tungstate or an alkali molybdate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention 1f relates to a flame-retardant glass wall consisting of two glass plates held apart by a frame. The space between the front 8112 glass plates is made waterproof at the outer edge and filled with salt-containing hydrogel, the aqueous phase of the hydrogel is round and diagonal 70 to 90 i4'
- Jil Bercent's Water and approximately 30 stories from IO)
(-St. is making gold mines with bathing salts.

This glazed flame-retardant glass wall is covered by the German patent 1) E-PS.
No. 2713849. The fireproofing effect of this persimmon glass wall in the event of a fire is that, first of all, a considerable amount of energy from the impact heat is absorbed by the evaporation of water;
It is based on the fact that a foam-like shield that acts as a heat shield is formed from salt after evaporation of water.

During the evaporation of water, the temperature of the glass wall increases only slightly on the side opposite to the one on which the heat acts, German Standard 1)
It remains well below the value allowed based on iN4102, which is approximately 140 C above the starting temperature. As soon as a foam-like shield against heat is formed during or after the evaporation of water, this foam shield assumes thermal protection and in particular prevents the penetration of heat radiation through the glass wall. Depending on the thickness of the gel layer, protective glass walls against fire can be produced in this way. This corresponds to the flame resistance degree F30 or F2O according to the German standard I) IN 4102 Part 2. A glass wall of this type constructed from three panes of glass corresponds to a flame resistance rating of F90 for the appropriate layer thickness.

In order to form an effective shield against heat, a sufficient multiplicity of salt must be included within the gel layer so that a sticky foam of sufficient consistency is formed. Therefore, the salt must have a relatively high solubility in water, and the solution of the salt, like the structure of the gel-forming polymer, should exhibit neither turbidity nor coloration. That is, they must be clearly transparent.

Although salts are particularly suitable for practical use in these conditions, sodium chloride, calcium chloride, magnesium chloride or other salts do not have a strong corrosive or corrosive effect on the metal of the frame separating the glass panes. Even when using steel or other corrosion-resistant metals, such as nickel and/or chromium, there is a risk that corrosion will appear on the partition frame and, if unfavorable conditions are encountered, corrosive substances may be trapped within the gel. There is also the possibility of dissolution, resulting in partial turbidity and/or coloration of Gel 1-.

The present invention aims to solve the problems pointed out above by developing a higher temperature flame retardant glass wall of the above type. The present glass wall prevents the risk of gel disturbance, coloring or clouding caused by corrosion on the partition metal frame.

This problem is solved according to the invention in that the salt-containing hydrogel contains a water-soluble anticorrosion substance as an additive.

In the case of glass walls of fire protection basins according to the invention (: t1, unlike the usual methods for preventing corrosion, i.e. the selection of corrosion-resistant substances or the coating of corroding materials with suitable paints) In this way, the preservative is added directly into the working medium that causes corrosion.In this way, all parts of the partition that come into contact with corrosive salt-containing solutions are
It will have to be obtained from the same contact method as the preservative. The corrosive effects of corrosive gels can be completely prevented according to the invention by adding suitable preservatives. These results are caused on the one hand by corrosive baths containing salts, but on the other hand also by the additives required for the polymerization to proceed to the gel-forming solution. In particular, the space separating the glass plates is filled with a salt-containing solution, caused by a catalytic system that acts with a strong oxidizing action to initiate the polymerization process to form the gel.

Since the gel already exhibits a selected composition, i.e., besides a high salt concentration, it also contains a polymeric system and also a catalytic system, so under these abnormal conditions it is difficult to add preservatives. By doing so, the desired result is reached without disturbing the entire system and also without adversely affecting other properties of the gel.1. ? It is impossible to predict that I will. The gel layer must in particular remain virtually completely transparent and uncolored, and the progress of the synthesis reaction must not be hindered by the addition of preservatives.

Water-soluble preservatives suitable for the purposes of the present invention include alkali phosphates, alkali tungstates and alkali hismolybdates. In particular, for the purpose of the present invention [7]
Sodium pyrophosphate (Na4P, 07' 10 H*
0), phosphoric acid water) IJ uA (Na, HPO, ・
12 H,0) and trisodium phosphate (Na, PO4)
Various sodium phosphates have been found to be effective and compatible, such as. The stiff compounds can be introduced individually or in the form of a mixture of several.

Next, the production of the flame-retardant mega glass wall of the present invention will be described with reference to the accompanying drawings, giving some specific examples.

Two plates 1 and 2 made of reinforced silicate glass are connected via a chassis or a metal frame 3 for partition. The partition frame 3 is constituted by a whole rope cross section 4 having a U-shaped cross section, and the cross sections 4 are connected by an angle piece or a connecting piece 5. The partition frame 3 consisting of the cross section 4 and the angle piece 5 is formed by adhesive. 6
It is glued to the two glass plates 1.2 by. The outer peripheral groove of the partition frame 3, which is defined by the edge of the glass plate, is filled with an adhesive waterproofing substance 7.

The angular or connecting part 5 has a connecting cross-section 9 between two legs 80 of the implant making an angle of 45° to each of them. This connecting section 9 is provided with an opening 10 . opening 10
serves to fill the space located between the glass walls with the liquid for forming the gel intermediate layer 12 and to remove gas from said intermediate space during the filling process.

The right-angled or shaped cross-section 4 and the angular or connecting part 5 consist of a corrosion-resistant steel plate containing, for example, 18% chromium, 12% nickel and 2.25% molybdenum. Even if the straight section 4 and the angle or connecting part 5 consist of corrosion-resistant metal sheets, corrosion phenomena may occur, especially in rough cross-sectional areas or strongly deformed parts of the angle part.

When producing a fire-resistant glass wall, first of all the partition frame 3 is formed by joining the cross section 4 and the angle part 5. Next, a layer of adhesive 6 is applied on the partition frame 3.

The partition frame coated in this way consists of two glass plates 1.2
Glue with. The intermediate space defined by the glass plate and the partition frame is then completely filled with the polymerizable solution via the opening 10. For the formation of gels or for polymerization in solution, monomers which polymerize in aqueous solution are used, which are based on water-soluble, in particular acrylic acid, conductors. Polymerization is initiated by adding a catalyst system formed by catalyst components such as peroxide and promoter components such as diethylaminopropyl nitrile (DEAPN) or triethanolamine in glycol (TEAG). In some cases, for example N,N'-methylene-2-acrylamide (MBA
) can also be added. As soon as the introduced solution is polymerized into a hydrogel, opening 1
0 is closed and the recess on the outside of the partition frame is filled with a curable adhesive waterproofing substance 7.

Next, some examples of chemical compositions of solutions forming the hydrodel layer 12 will be shown.

Example l Water 6
00j'λfgct, ・611,0
200 r acrylamide
4 (IN-methylol acrylamide
4 (1 diethylaminopropyl nitrile (I) EAPN) 2fN, N'-methylene-2-acrylamide (MBA) 0.05
Mix in yNag WO42f' and then degas the solution. 8. Add 1 inch of solution glue.
Adjust to a value between 5 and 9.0. Next, ammonium persulfate solution of 5eII 13? Add and stir to mix. The solution obtained is introduced into the intermediate space of the double glass wall prepared beforehand and filled. After 30 minutes, the solution is completely polymerized to obtain a hydrogel.

The flame-retardant glass walls produced in this way do not exhibit any corrosion phenomena even under severe test conditions.

Example 2 Water 82
02Na(,'l 180
f Urine *72 Acrylamide 451N
-Methyloacrylamide +y
45y triethanolcyamine (TEAG)
1.5 tNIN'-mef'
Ren-2-7 Clear A/7 Mid (MICA) 0.
04 rNaB PO41j' and degas the resulting solution. Adjust the pII of the solution to a value of 8.5-9.0. Then 5% persulfate °
Ammonium solution 15j' was added and stirred to mix.

Introducing the resulting solution into the space located between the glass plates,
filled the space with. After 20 minutes, the solution is totally 11-combined to give hydrodel.

The flame-retardant glass walls produced in this way do not show any corrosion phenomena even after long-term tests under harsh test conditions.

Example 3 Water 590
vCaC1@・2H! 0 300
ft urea
5v Rhone Sorenc (RHOME FTOU
[Lokaji'L-CI((')C^0I] by T,ENC)
L) 1295j 150r Triethanolamine ('I'EAG) I
fN, N'-Mef 7-2-7 Cryvl Mid(N
BA, ) o, osrNazWO4If NaIMo04
Mix 1r and degas the resulting solution. pH
After adjusting the value to 8.5-9, sodium persulfate (Na
Add 12 r of a 2.5 liter solution of zSa(Im) and stir to mix. The resulting solution was introduced into a previously prepared intermediate space of a double glass wall to fill this space. The time elapsed until complete polymerization of the hydrogel was increased to approximately 40 minutes.

The flame-retardant glass walls produced in this way do not exhibit any corrosion phenomena even under severe test conditions.

Example 4 A compatible solution to obtain a hydrogel was prepared starting from the following ingredients.

Water 750
1NaC1150j' Urea 7.
51 Acrylic amide 1 3
5? N-Methyromyl acrylamide
35-triethanolamine (1'EAG
) 2 VN, N'-methylene-2-acrylamide (MBA) 0. o 4
yNap 'PO40,75r NaB llPO4・1211z0
0.75 tl of these components were mixed and the resulting solution was degassed. The pfl of the solution was adjusted to a value of 8.5-9.0.

Next, 2.5 g of aqueous solution 202 was introduced. After stirring the solution, it was introduced into the space located between the glass plates to fill this space. After 20 minutes the solution is completely polymerized and a hydrogel is obtained.

A rotten odor test of the fireproof glass wall manufactured in this way showed no corrosion phenomenon at high temperatures! "won.

Example 5 Water 75 (I
NaCL 16 (H' Rhône Poulenc's [Locasil 1295J 180
t-diethylaminozoro L! 'A Nitrile (+) EAP
N) 1.5fN, N'-methine-2-7
Clear A77mid (MBA,) 0.06 fNal
llPO42t was mixed and the resulting solution was degassed. pH of solution is 8
．． It was adjusted to a value of 5 to 9.0. Next, 2.5-ammonium persulfate solution 251 was added and mixed by stirring, and the diameter solution was completely polymerized to obtain a hydrogel.

The flame-retardant glass walls produced in this way do not show any corrosion phenomena even after long tests under severe test conditions.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a fire-preventing glass wall filled with hydrogel, and FIG. 2 is a cross-sectional view taken along line l--■ in FIG. 1. 1.2... plate glass, 3... metal frame for partition,
5... Angle parts, 6... Adhesive, 7... Adhesive waterproofing substance, 8... Embedded legs, 1 (1... Opening, 12... Hydrogel layer. 1000 pieces: Tei it'Ke1 1985 10 i]9 ++ Special, i'I#'l-Secretary Black Eye] Ming Hl
The person who writes Tono 3, Supplement 11-

Claims (6)

[Claims] (1) A fire-retardant glass wall comprising two glass panes held at a distance by a metal frame, the intermediate space being waterproof at the outer edges and containing a salt-containing hydrogel. The aqueous phase of the hydrogel is filled with approximately 7
0 to 90% water and approximately 10 to 30% by weight
A flame-retardant glass wall, characterized in that the salt-containing hydrogel contains a water-soluble anticorrosion substance as an additive. (2) The flame-retardant glass wall according to claim 1, characterized in that the anticorrosive substance is composed of an alkali phosphate, an alkali tungstate, or an alkali molybdate. (3) The anticorrosion substance is sodium pyrophosphate (Na_4P_
3O_7・10H_2O), sodium hydrogen phosphate (Na
At least one selected from _4HPO_4・12H_2O) and trisodium phosphate (Na_3PO_4)
The flame-retardant glass wall according to claim 2, characterized in that it consists of the following components: (4) Claims 1 to 3, characterized in that the anticorrosion substance is added in an amount of 0.2 to 2 weight percent relative to the amount of water-soluble salt. Flame-retardant glass walls. (5) Hydrogels containing salts and anticorrosion substances mainly contain NaCl, CaCl_2 and M as water-soluble salts.
gCl_2 and derivatives of acrylic acid such as acrylamide and N-methylolacrylamide as polymerizable substances that form gels in aqueous solution, and further gel-forming agents. The catalyst according to any one of claims 1 to 4, characterized in that it contains diethylaminopropyl nitrile (DEAPN) or triethanolamine in glycol (TEAG) as the promoting component of the catalyst system. Flammable glass walls. (6) Hydrogel containing salt is N,N'-methylene-
6. Flame-retardant glass wall according to claim 5, characterized in that it contains a crosslinking agent such as 2-acrylamide (MBA).